mempool/frontend/src/app/shared/components/truncate/truncate.component.html

<span class="truncate" [style.max-width]="maxWidth ? maxWidth + 'px' : null">
  <ng-container *ngIf="!rtl">
    <span class="first">{{text.slice(0,-lastChars)}}</span>
    <span class="last-four">{{text.slice(-lastChars)}}</span>
    <ng-content></ng-content>
  </ng-container>
  <ng-container *ngIf="rtl">
    <span class="first">{{text.slice(lastChars)}}</span>
    <span class="last-four">{{text.slice(0,lastChars)}}</span>
    <ng-content></ng-content>
  </ng-container>
</span>